/* =============================================
   SELF-HOSTED FONTS
============================================= */
@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-300.20260321-01.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-300-italic.20260321-01.woff2') format('woff2');
  font-weight: 300;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-400.20260321-01.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-500.20260321-01.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-600.20260321-01.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-700.20260321-01.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans';
  src: url('../fonts/noto-sans-900.20260321-01.woff2') format('woff2');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans Mono';
  src: url('../fonts/noto-sans-mono-400.20260321-01.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans Mono';
  src: url('../fonts/noto-sans-mono-600.20260321-01.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* =============================================
    CSS CUSTOM PROPERTIES
============================================= */
:root {
    --bg-deep:      #0a0a0a;
    --bg-surface:   #111111;
    --bg-elevated:  #1a1a1a;
    --accent:       #00c8d4;
    --accent-dim:   #008a94;
    --accent-glow:  rgba(0, 200, 212, 0.15);
    --text-primary: #e0e0e0;
    --text-secondary: #c5c5c5;
    --steel:        #7a7a8c;
    --white:        #ffffff;
    --border:       rgba(0, 200, 212, 0.2);
    --border-steel: rgba(122, 122, 140, 0.25);
    --font-main:    'Noto Sans', sans-serif;
    --font-mono:    'Noto Sans Mono', monospace;
}

/* =============================================
    RESET & BASE
============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--white); }

/* =============================================
    UTILITY
============================================= */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
    display: block;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.section-body {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 640px;
    line-height: 1.8;
}

.teal { color: var(--accent); }

/* =============================================
    NAV
============================================= */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-steel);
    transition: background 0.3s;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.nav-logo img {
    height: 42px;
    width: 42px;
    object-fit: contain;
}

.nav-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.nav-logo-name {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--white);
}

.nav-logo-sub {
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.nav-links a {
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent); }

.nav-cta {
    font-size: 0.78rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.14em !important;
    color: var(--accent) !important;
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: 2px;
    transition: background 0.2s, color 0.2s !important;
}

.nav-cta:hover {
    background: var(--accent) !important;
    color: var(--bg-deep) !important;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============================================
    HERO
============================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-color: var(--bg-deep);
}

@media (min-width: 769px) {
    .hero {
    background-image: url('../../img/background.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    }
}

/* Dark overlay for readability over hero image */
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
    105deg,
    rgba(10, 10, 10, 0.35) 0%,
    rgba(10, 10, 10, 0.60) 40%,
    rgba(10, 10, 10, 0.15) 100%
    );
    z-index: 1;
}

/* Geometric accent line — decorative */
.hero-line {
    position: absolute;
    top: 0; bottom: 0;
    left: 22px;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--accent), transparent);
    opacity: 0.5;
    z-index: 1;
}

/* Corner bracket decorations */

.hero::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 60px;
    z-index: 2;
}

.hero::before {
    top: 100px;
    left: 24px;
    border-top: 1px solid var(--accent);
    border-left: 1px solid var(--accent);
    opacity: 0.4;
}

.hero::after {
    bottom: 40px;
    right: 24px;
    border-bottom: 1px solid var(--accent);
    border-right: 1px solid var(--accent);
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding-top: 68px;
    width: 100%;
}

.hero-inner {
    max-width: 660px;
    padding-left: 22px;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 28px;
}

.hero-eyebrow::before {
    content: '';
    display: inline-block;
    width: 32px;
    height: 1px;
    background: var(--accent);
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.08;
    color: var(--white);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    font-weight: 300;
    color: var(--accent);
    letter-spacing: 0.06em;
    margin-bottom: 32px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 44px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-deep);
    font-family: var(--font-main);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 14px 32px;
    border-radius: 2px;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--white);
    color: var(--bg-deep);
    transform: translateY(-1px);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 14px 32px;
    border-radius: 2px;
    border: 1px solid var(--border-steel);
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
    text-decoration: none;
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* =============================================
    PROBLEM / SOLUTION BAND
============================================= */
.problem-band {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border-steel);
    border-bottom: 1px solid var(--border-steel);
    padding: 72px 0;
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: stretch;
}

.problem-statement,
.solution-callout {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    padding: 32px;
    border-radius: 2px;
}

.problem-statement h2 {
    font-size: clamp(1.3rem, 1.7vw, 1.3rem);
    font-weight: 700;
    color: var(--white);
    line-height: 1.3;
    margin-bottom: 20px;
}

.problem-statement p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.85;
    margin-bottom: 16px;
}

.solution-callout h2 {
    font-size: clamp(1.3rem, 1.7vw, 1.3rem);
    font-weight: 700;
    color: var(--white);
    line-height: 1.3;
    margin-bottom: 20px;
}

.solution-callout p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.85;
    margin-bottom: 16px;
}

/* =============================================
    ARCAP PRODUCT SECTION
============================================= */
.arcap-section {
    padding: 96px 0;
    background: var(--bg-deep);
}

.arcap-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    margin-bottom: 64px;
    align-items: start;
}

.arcap-intro .section-body {
    margin-bottom: 0;
}

/* =============================================
    ARCAP CAROUSEL
============================================= */
.arcap-carousel-wrap {
    position: relative;
    margin-bottom: 64px;
    padding: 0 60px;
}

.arcap-carousel {
    display: flex;
    gap: 24px;
    overflow: hidden;
    justify-content: center;
}

.carousel-slide {
    flex: 0 0 300px;
    width: 300px;
    height: 300px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-steel);
    border-radius: 2px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: border-color 0.25s;
}

.carousel-slide:hover {
    border-color: var(--border);
}

.carousel-slide img {
    width: 300px;
    height: 300px;
    object-fit: cover;
    display: block;
}

.carousel-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    height: 100%;
}

.carousel-placeholder svg {
    width: 48px;
    height: 48px;
    color: var(--steel);
}

.carousel-placeholder-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--steel);
    text-align: center;
    line-height: 1.6;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--accent);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
    z-index: 2;
    padding: 0;
}

.carousel-btn:hover {
    background: var(--accent);
    color: var(--bg-deep);
}

.carousel-btn svg {
    width: 18px;
    height: 18px;
}

.carousel-btn-prev { left: 8px; }
.carousel-btn-next { right: 8px; }
.carousel-btn.visible { display: flex; }

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 20px;
}

.carousel-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--steel);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    border: none;
    padding: 12px;
    box-sizing: content-box;
    background-clip: content-box;
}

.carousel-dot.active {
    background: var(--accent);
    background-clip: content-box;
    transform: scale(1.3);
}

/* Specs grid */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border-steel);
    border: 1px solid var(--border-steel);
    border-radius: 2px;
    overflow: hidden;
}

.spec-item {
    background: var(--bg-surface);
    padding: 24px 20px;
    transition: background 0.2s;
    text-align: center;
    vertical-align: auto;
}

.spec-item:hover {
    background: var(--bg-elevated);
}

.spec-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 6px;
    display: block;
}

.spec-value {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
    line-height: 1.4;
}

/* Feature cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-steel);
    border-radius: 2px;
    padding: 28px;
    transition: border-color 0.25s, background 0.25s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s;
}

.feature-card:hover {
    border-color: var(--border);
    background: var(--bg-elevated);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 36px;
    height: 36px;
    margin-bottom: 16px;
    color: var(--accent);
}

.feature-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* Install steps */
.install-section {
    margin-top: 72px;
    padding-top: 64px;
    border-top: 1px solid var(--border-steel);
}

.install-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    margin-top: 40px;
    position: relative;
}

.install-steps::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(to right, var(--accent), var(--accent-dim), var(--accent));
    opacity: 0.4;
    z-index: 0;
}

.install-step {
    text-align: center;
    padding: 0 12px;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 1px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
}

.install-step h4 {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
    letter-spacing: 0.04em;
}

.install-step p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =============================================
    DOCUMENTATION SECTION
============================================= */
.docs-section {
    padding: 80px 0;
    background: var(--bg-deep);
    border-top: 1px solid var(--border-steel);
}

.docs-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 40px;
    max-width: 640px;
}

.docs-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-steel);
    border-left: 3px solid var(--accent);
    border-radius: 2px;
    padding: 16px 20px;
    text-decoration: none;
    color: var(--text-primary);
    transition: background 0.2s, border-color 0.2s;
}

.docs-item:hover {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--white);
}

.docs-item-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    color: var(--accent);
}

.docs-item-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.docs-item-name {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--white);
    line-height: 1.3;
}

.docs-item-file {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    color: var(--steel);
}

.docs-item-dl {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
}

/* =============================================
    CUSTOM MOULDING SECTION
============================================= */
.moulding-section {
    padding: 80px 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border-steel);
}

.moulding-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.moulding-content .section-body {
    margin-bottom: 24px;
}

.moulding-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}

.moulding-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.moulding-list li::before {
    content: '▸';
    color: var(--accent);
    font-size: 0.8rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.moulding-callout {
    background: var(--bg-surface);
    border: 1px solid var(--border-steel);
    border-radius: 2px;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.moulding-stat {
    border-bottom: 1px solid var(--border-steel);
    padding-bottom: 24px;
}

.moulding-stat:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.moulding-stat-num {
    font-size: 2rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 20px;
}

.moulding-stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* =============================================
    CONTACT SECTION
============================================= */
.contact-section {
    padding: 96px 0;
    background: var(--bg-deep);
    border-top: 1px solid var(--border-steel);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 80px;
    align-items: start;
}

.contact-info .section-body {
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-detail-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
}

.contact-detail-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-detail-value a {
    color: var(--text-primary);
}

.contact-detail-value a:hover {
    color: var(--accent);
}

/* Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    background: var(--bg-elevated);
    border: 1px solid var(--border-steel);
    border-radius: 2px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.95rem;
    padding: 12px 16px;
    outline: none;
    transition: border-color 0.2s, background 0.2s;
    width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--steel);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: #1f1f1f;
}

.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

.form-submit {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.form-submit .btn-primary {
    font-size: 0.82rem;
}

.form-note {
    font-size: 0.78rem;
    color: var(--steel);
    line-height: 1.5;
}

/* Form states */
.form-status {
    display: none;
    padding: 14px 18px;
    border-radius: 2px;
    font-size: 0.9rem;
    font-weight: 500;
}

.form-status.success {
    display: block;
    background: rgba(0, 200, 212, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.form-status.error {
    display: block;
    background: rgba(200, 60, 60, 0.1);
    border: 1px solid #c83c3c;
    color: #e07070;
}

/* =============================================
    FOOTER
============================================= */
footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-steel);
    padding: 40px 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo img {
    height: 32px;
    width: 32px;
    object-fit: contain;
    opacity: 0.7;
}

.footer-logo-text {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.footer-copy {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.footer-links a {
    font-size: 0.78rem;
    color: var(--text-secondary);
    letter-spacing: 0.06em;
}

.footer-links a:hover {
    color: var(--accent);
}

/* =============================================
    SCROLL REVEAL ANIMATION
============================================= */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* =============================================
    RESPONSIVE
============================================= */
@media (max-width: 900px) {
    .problem-grid,
    .arcap-header,
    .moulding-inner,
    .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    }

    .specs-grid {
    grid-template-columns: repeat(2, 1fr);
    }

    .install-steps {
    grid-template-columns: 1fr;
    gap: 28px;
    }

    .install-steps::before { display: none; }

    .install-step {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 16px;
    text-align: left;
    align-items: start;
    }

    .step-num { margin: 0; }
}

@media (max-width: 768px) {
    .nav-links {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: rgba(10, 10, 10, 0.98);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--border-steel);
    transform: translateY(-300%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0.3s ease;
    z-index: 99;
    }

    .nav-links.open {
    transform: translateY(0);
    visibility: visible;
    }

    .nav-links li {
    border-bottom: 1px solid var(--border-steel);
    }

    .nav-links li:last-child { border-bottom: none; }

    .nav-links a {
    display: block;
    padding: 16px 0;
    font-size: 0.9rem;
    }

    .nav-cta {
    border: none !important;
    padding: 16px 0 !important;
    }

    .nav-toggle { display: flex; }

    .features-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .specs-grid { grid-template-columns: 1fr; }
    .hero-line { display: none; }
    .hero::before, .hero::after { display: none; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; }
    .btn-primary, .btn-secondary { text-align: center; }
}

/* =============================================
   IN DEPTH SECTION
============================================= */
.indepth-section {
  padding: 80px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-steel);
}

.indepth-grid {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 720px;
}

.indepth-card {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-steel);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
  padding: 28px;
  text-decoration: none;
  color: var(--text-primary);
  transition: background 0.2s, border-color 0.2s;
}

.indepth-card:hover {
  background: var(--bg-deep);
  border-color: var(--border);
  color: var(--text-primary);
}

.indepth-card-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  color: var(--accent);
  margin-top: 2px;
}

.indepth-card-icon svg {
  width: 100%;
  height: 100%;
}

.indepth-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.indepth-card-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.indepth-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
}

.indepth-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.indepth-card-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-top: 4px;
}